BoilerFaultCodesBaxi A.02.06 Fault Code
Also written as A0206 — same fault.
The Baxi A.02.06 fault code means: your boiler has detected that the water pressure in your heating system is too low to operate safely and has shut down to protect itself.. It appears on 7 Baxi models in our database.
Technical description: Low pressure in heating circuit
DIY fix possible
Locate the filling loop (usually a silver flexible hose) underneath or near the boiler.Slowly open the one or two taps/valves until you hear water moving and watch the pressure gauge.Close the valves tightly once the pressure gauge needle reaches between 1.0 and 1.5 bar.
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Baxi models that show the A.02.06 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi A.02.06 fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026